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Commit 28ff2f7a authored by Hans de Goede's avatar Hans de Goede Committed by Jean Delvare
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hwmon: (sch5627) Factor out some code shared with sch5636 driver 

This patch adds a new sch56xx-common.ko which contains code which will also
be used in the new sch5636 driver.
Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
parent b6844e8f
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Showing with 390 additions and 310 deletions
drivers/hwmon/Kconfig
View file @ 28ff2f7a
...@@ -1041,8 +1041,13 @@ config SENSORS_SMSC47B397 ...@@ -1041,8 +1041,13 @@ config SENSORS_SMSC47B397
This driver can also be built as a module. If so, the module This driver can also be built as a module. If so, the module
will be called smsc47b397. will be called smsc47b397.
config SENSORS_SCH56XX_COMMON
tristate
default n
config SENSORS_SCH5627 config SENSORS_SCH5627
tristate "SMSC SCH5627" tristate "SMSC SCH5627"
select SENSORS_SCH56XX_COMMON
help help
If you say yes here you get support for the hardware monitoring If you say yes here you get support for the hardware monitoring
features of the SMSC SCH5627 Super-I/O chip. features of the SMSC SCH5627 Super-I/O chip.
......
drivers/hwmon/Makefile
View file @ 28ff2f7a
...@@ -95,6 +95,7 @@ obj-$(CONFIG_SENSORS_PC87360) += pc87360.o ...@@ -95,6 +95,7 @@ obj-$(CONFIG_SENSORS_PC87360) += pc87360.o
obj-$(CONFIG_SENSORS_PC87427) += pc87427.o obj-$(CONFIG_SENSORS_PC87427) += pc87427.o
obj-$(CONFIG_SENSORS_PCF8591) += pcf8591.o obj-$(CONFIG_SENSORS_PCF8591) += pcf8591.o
obj-$(CONFIG_SENSORS_S3C) += s3c-hwmon.o obj-$(CONFIG_SENSORS_S3C) += s3c-hwmon.o
obj-$(CONFIG_SENSORS_SCH56XX_COMMON)+= sch56xx-common.o
obj-$(CONFIG_SENSORS_SCH5627) += sch5627.o obj-$(CONFIG_SENSORS_SCH5627) += sch5627.o
obj-$(CONFIG_SENSORS_SHT15) += sht15.o obj-$(CONFIG_SENSORS_SHT15) += sht15.o
obj-$(CONFIG_SENSORS_SHT21) += sht21.o obj-$(CONFIG_SENSORS_SHT21) += sht21.o
......
drivers/hwmon/sch5627.c
View file @ 28ff2f7a
...@@ -28,33 +28,15 @@ ...@@ -28,33 +28,15 @@
#include <linux/hwmon-sysfs.h> #include <linux/hwmon-sysfs.h>
#include <linux/err.h> #include <linux/err.h>
#include <linux/mutex.h> #include <linux/mutex.h>
#include <linux/io.h> #include "sch56xx-common.h"
#include <linux/acpi.h>
#include <linux/delay.h>
#define DRVNAME "sch5627" #define DRVNAME "sch5627"
#define DEVNAME DRVNAME /* We only support one model */ #define DEVNAME DRVNAME /* We only support one model */
#define SIO_SCH5627_EM_LD 0x0C /* Embedded Microcontroller LD */
#define SIO_UNLOCK_KEY 0x55 /* Key to enable Super-I/O */
#define SIO_LOCK_KEY 0xAA /* Key to disable Super-I/O */
#define SIO_REG_LDSEL 0x07 /* Logical device select */
#define SIO_REG_DEVID 0x20 /* Device ID */
#define SIO_REG_ENABLE 0x30 /* Logical device enable */
#define SIO_REG_ADDR 0x66 /* Logical device address (2 bytes) */
#define SIO_SCH5627_ID 0xC6 /* Chipset ID */
#define REGION_LENGTH 9
#define SCH5627_HWMON_ID 0xa5 #define SCH5627_HWMON_ID 0xa5
#define SCH5627_COMPANY_ID 0x5c #define SCH5627_COMPANY_ID 0x5c
#define SCH5627_PRIMARY_ID 0xa0 #define SCH5627_PRIMARY_ID 0xa0
#define SCH5627_CMD_READ 0x02
#define SCH5627_CMD_WRITE 0x03
#define SCH5627_REG_BUILD_CODE 0x39 #define SCH5627_REG_BUILD_CODE 0x39
#define SCH5627_REG_BUILD_ID 0x3a #define SCH5627_REG_BUILD_ID 0x3a
#define SCH5627_REG_HWMON_ID 0x3c #define SCH5627_REG_HWMON_ID 0x3c
...@@ -111,182 +93,6 @@ struct sch5627_data { ...@@ -111,182 +93,6 @@ struct sch5627_data {
u16 in[SCH5627_NO_IN]; u16 in[SCH5627_NO_IN];
}; };
static struct platform_device *sch5627_pdev;
/* Super I/O functions */
static inline int superio_inb(int base, int reg)
{
outb(reg, base);
return inb(base + 1);
}
static inline int superio_enter(int base)
{
/* Don't step on other drivers' I/O space by accident */
if (!request_muxed_region(base, 2, DRVNAME)) {
pr_err("I/O address 0x%04x already in use\n", base);
return -EBUSY;
}
outb(SIO_UNLOCK_KEY, base);
return 0;
}
static inline void superio_select(int base, int ld)
{
outb(SIO_REG_LDSEL, base);
outb(ld, base + 1);
}
static inline void superio_exit(int base)
{
outb(SIO_LOCK_KEY, base);
release_region(base, 2);
}
static int sch5627_send_cmd(struct sch5627_data *data, u8 cmd, u16 reg, u8 v)
{
u8 val;
int i;
/*
* According to SMSC for the commands we use the maximum time for
* the EM to respond is 15 ms, but testing shows in practice it
* responds within 15-32 reads, so we first busy poll, and if
* that fails sleep a bit and try again until we are way past
* the 15 ms maximum response time.
*/
const int max_busy_polls = 64;
const int max_lazy_polls = 32;
/* (Optional) Write-Clear the EC to Host Mailbox Register */
val = inb(data->addr + 1);
outb(val, data->addr + 1);
/* Set Mailbox Address Pointer to first location in Region 1 */
outb(0x00, data->addr + 2);
outb(0x80, data->addr + 3);
/* Write Request Packet Header */
outb(cmd, data->addr + 4); /* VREG Access Type read:0x02 write:0x03 */
outb(0x01, data->addr + 5); /* # of Entries: 1 Byte (8-bit) */
outb(0x04, data->addr + 2); /* Mailbox AP to first data entry loc. */
/* Write Value field */
if (cmd == SCH5627_CMD_WRITE)
outb(v, data->addr + 4);
/* Write Address field */
outb(reg & 0xff, data->addr + 6);
outb(reg >> 8, data->addr + 7);
/* Execute the Random Access Command */
outb(0x01, data->addr); /* Write 01h to the Host-to-EC register */
/* EM Interface Polling "Algorithm" */
for (i = 0; i < max_busy_polls + max_lazy_polls; i++) {
if (i >= max_busy_polls)
msleep(1);
/* Read Interrupt source Register */
val = inb(data->addr + 8);
/* Write Clear the interrupt source bits */
if (val)
outb(val, data->addr + 8);
/* Command Completed ? */
if (val & 0x01)
break;
}
if (i == max_busy_polls + max_lazy_polls) {
pr_err("Max retries exceeded reading virtual "
"register 0x%04hx (%d)\n", reg, 1);
return -EIO;
}
/*
* According to SMSC we may need to retry this, but sofar I've always
* seen this succeed in 1 try.
*/
for (i = 0; i < max_busy_polls; i++) {
/* Read EC-to-Host Register */
val = inb(data->addr + 1);
/* Command Completed ? */
if (val == 0x01)
break;
if (i == 0)
pr_warn("EC reports: 0x%02x reading virtual register "
"0x%04hx\n", (unsigned int)val, reg);
}
if (i == max_busy_polls) {
pr_err("Max retries exceeded reading virtual "
"register 0x%04hx (%d)\n", reg, 2);
return -EIO;
}
/*
* According to the SMSC app note we should now do:
*
* Set Mailbox Address Pointer to first location in Region 1 *
* outb(0x00, data->addr + 2);
* outb(0x80, data->addr + 3);
*
* But if we do that things don't work, so let's not.
*/
/* Read Value field */
if (cmd == SCH5627_CMD_READ)
return inb(data->addr + 4);
return 0;
}
static int sch5627_read_virtual_reg(struct sch5627_data *data, u16 reg)
{
return sch5627_send_cmd(data, SCH5627_CMD_READ, reg, 0);
}
static int sch5627_write_virtual_reg(struct sch5627_data *data,
u16 reg, u8 val)
{
return sch5627_send_cmd(data, SCH5627_CMD_WRITE, reg, val);
}
static int sch5627_read_virtual_reg16(struct sch5627_data *data, u16 reg)
{
int lsb, msb;
/* Read LSB first, this will cause the matching MSB to be latched */
lsb = sch5627_read_virtual_reg(data, reg);
if (lsb < 0)
return lsb;
msb = sch5627_read_virtual_reg(data, reg + 1);
if (msb < 0)
return msb;
return lsb | (msb << 8);
}
static int sch5627_read_virtual_reg12(struct sch5627_data *data, u16 msb_reg,
u16 lsn_reg, int high_nibble)
{
int msb, lsn;
/* Read MSB first, this will cause the matching LSN to be latched */
msb = sch5627_read_virtual_reg(data, msb_reg);
if (msb < 0)
return msb;
lsn = sch5627_read_virtual_reg(data, lsn_reg);
if (lsn < 0)
return lsn;
if (high_nibble)
return (msb << 4) | (lsn >> 4);
else
return (msb << 4) | (lsn & 0x0f);
}
static struct sch5627_data *sch5627_update_device(struct device *dev) static struct sch5627_data *sch5627_update_device(struct device *dev)
{ {
struct sch5627_data *data = dev_get_drvdata(dev); struct sch5627_data *data = dev_get_drvdata(dev);
...@@ -297,7 +103,7 @@ static struct sch5627_data *sch5627_update_device(struct device *dev) ...@@ -297,7 +103,7 @@ static struct sch5627_data *sch5627_update_device(struct device *dev)
/* Trigger a Vbat voltage measurement every 5 minutes */ /* Trigger a Vbat voltage measurement every 5 minutes */
if (time_after(jiffies, data->last_battery + 300 * HZ)) { if (time_after(jiffies, data->last_battery + 300 * HZ)) {
sch5627_write_virtual_reg(data, SCH5627_REG_CTRL, sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
data->control | 0x10); data->control | 0x10);
data->last_battery = jiffies; data->last_battery = jiffies;
} }
...@@ -305,7 +111,7 @@ static struct sch5627_data *sch5627_update_device(struct device *dev) ...@@ -305,7 +111,7 @@ static struct sch5627_data *sch5627_update_device(struct device *dev)
/* Cache the values for 1 second */ /* Cache the values for 1 second */
if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
for (i = 0; i < SCH5627_NO_TEMPS; i++) { for (i = 0; i < SCH5627_NO_TEMPS; i++) {
val = sch5627_read_virtual_reg12(data, val = sch56xx_read_virtual_reg12(data->addr,
SCH5627_REG_TEMP_MSB[i], SCH5627_REG_TEMP_MSB[i],
SCH5627_REG_TEMP_LSN[i], SCH5627_REG_TEMP_LSN[i],
SCH5627_REG_TEMP_HIGH_NIBBLE[i]); SCH5627_REG_TEMP_HIGH_NIBBLE[i]);
...@@ -317,7 +123,7 @@ static struct sch5627_data *sch5627_update_device(struct device *dev) ...@@ -317,7 +123,7 @@ static struct sch5627_data *sch5627_update_device(struct device *dev)
} }
for (i = 0; i < SCH5627_NO_FANS; i++) { for (i = 0; i < SCH5627_NO_FANS; i++) {
val = sch5627_read_virtual_reg16(data, val = sch56xx_read_virtual_reg16(data->addr,
SCH5627_REG_FAN[i]); SCH5627_REG_FAN[i]);
if (unlikely(val < 0)) { if (unlikely(val < 0)) {
ret = ERR_PTR(val); ret = ERR_PTR(val);
...@@ -327,7 +133,7 @@ static struct sch5627_data *sch5627_update_device(struct device *dev) ...@@ -327,7 +133,7 @@ static struct sch5627_data *sch5627_update_device(struct device *dev)
} }
for (i = 0; i < SCH5627_NO_IN; i++) { for (i = 0; i < SCH5627_NO_IN; i++) {
val = sch5627_read_virtual_reg12(data, val = sch56xx_read_virtual_reg12(data->addr,
SCH5627_REG_IN_MSB[i], SCH5627_REG_IN_MSB[i],
SCH5627_REG_IN_LSN[i], SCH5627_REG_IN_LSN[i],
SCH5627_REG_IN_HIGH_NIBBLE[i]); SCH5627_REG_IN_HIGH_NIBBLE[i]);
...@@ -355,18 +161,21 @@ static int __devinit sch5627_read_limits(struct sch5627_data *data) ...@@ -355,18 +161,21 @@ static int __devinit sch5627_read_limits(struct sch5627_data *data)
* Note what SMSC calls ABS, is what lm_sensors calls max * Note what SMSC calls ABS, is what lm_sensors calls max
* (aka high), and HIGH is what lm_sensors calls crit. * (aka high), and HIGH is what lm_sensors calls crit.
*/ */
val = sch5627_read_virtual_reg(data, SCH5627_REG_TEMP_ABS[i]); val = sch56xx_read_virtual_reg(data->addr,
SCH5627_REG_TEMP_ABS[i]);
if (val < 0) if (val < 0)
return val; return val;
data->temp_max[i] = val; data->temp_max[i] = val;
val = sch5627_read_virtual_reg(data, SCH5627_REG_TEMP_HIGH[i]); val = sch56xx_read_virtual_reg(data->addr,
SCH5627_REG_TEMP_HIGH[i]);
if (val < 0) if (val < 0)
return val; return val;
data->temp_crit[i] = val; data->temp_crit[i] = val;
} }
for (i = 0; i < SCH5627_NO_FANS; i++) { for (i = 0; i < SCH5627_NO_FANS; i++) {
val = sch5627_read_virtual_reg16(data, SCH5627_REG_FAN_MIN[i]); val = sch56xx_read_virtual_reg16(data->addr,
SCH5627_REG_FAN_MIN[i]);
if (val < 0) if (val < 0)
return val; return val;
data->fan_min[i] = val; data->fan_min[i] = val;
...@@ -667,7 +476,7 @@ static int __devinit sch5627_probe(struct platform_device *pdev) ...@@ -667,7 +476,7 @@ static int __devinit sch5627_probe(struct platform_device *pdev)
mutex_init(&data->update_lock); mutex_init(&data->update_lock);
platform_set_drvdata(pdev, data); platform_set_drvdata(pdev, data);
val = sch5627_read_virtual_reg(data, SCH5627_REG_HWMON_ID); val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_HWMON_ID);
if (val < 0) { if (val < 0) {
err = val; err = val;
goto error; goto error;
...@@ -679,7 +488,7 @@ static int __devinit sch5627_probe(struct platform_device *pdev) ...@@ -679,7 +488,7 @@ static int __devinit sch5627_probe(struct platform_device *pdev)
goto error; goto error;
} }
val = sch5627_read_virtual_reg(data, SCH5627_REG_COMPANY_ID); val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_COMPANY_ID);
if (val < 0) { if (val < 0) {
err = val; err = val;
goto error; goto error;
...@@ -691,7 +500,7 @@ static int __devinit sch5627_probe(struct platform_device *pdev) ...@@ -691,7 +500,7 @@ static int __devinit sch5627_probe(struct platform_device *pdev)
goto error; goto error;
} }
val = sch5627_read_virtual_reg(data, SCH5627_REG_PRIMARY_ID); val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_PRIMARY_ID);
if (val < 0) { if (val < 0) {
err = val; err = val;
goto error; goto error;
...@@ -703,25 +512,28 @@ static int __devinit sch5627_probe(struct platform_device *pdev) ...@@ -703,25 +512,28 @@ static int __devinit sch5627_probe(struct platform_device *pdev)
goto error; goto error;
} }
build_code = sch5627_read_virtual_reg(data, SCH5627_REG_BUILD_CODE); build_code = sch56xx_read_virtual_reg(data->addr,
SCH5627_REG_BUILD_CODE);
if (build_code < 0) { if (build_code < 0) {
err = build_code; err = build_code;
goto error; goto error;
} }
build_id = sch5627_read_virtual_reg16(data, SCH5627_REG_BUILD_ID); build_id = sch56xx_read_virtual_reg16(data->addr,
SCH5627_REG_BUILD_ID);
if (build_id < 0) { if (build_id < 0) {
err = build_id; err = build_id;
goto error; goto error;
} }
hwmon_rev = sch5627_read_virtual_reg(data, SCH5627_REG_HWMON_REV); hwmon_rev = sch56xx_read_virtual_reg(data->addr,
SCH5627_REG_HWMON_REV);
if (hwmon_rev < 0) { if (hwmon_rev < 0) {
err = hwmon_rev; err = hwmon_rev;
goto error; goto error;
} }
val = sch5627_read_virtual_reg(data, SCH5627_REG_CTRL); val = sch56xx_read_virtual_reg(data->addr, SCH5627_REG_CTRL);
if (val < 0) { if (val < 0) {
err = val; err = val;
goto error; goto error;
...@@ -734,7 +546,7 @@ static int __devinit sch5627_probe(struct platform_device *pdev) ...@@ -734,7 +546,7 @@ static int __devinit sch5627_probe(struct platform_device *pdev)
} }
/* Trigger a Vbat voltage measurement, so that we get a valid reading /* Trigger a Vbat voltage measurement, so that we get a valid reading
the first time we read Vbat */ the first time we read Vbat */
sch5627_write_virtual_reg(data, SCH5627_REG_CTRL, sch56xx_write_virtual_reg(data->addr, SCH5627_REG_CTRL,
data->control | 0x10); data->control | 0x10);
data->last_battery = jiffies; data->last_battery = jiffies;
...@@ -746,6 +558,7 @@ static int __devinit sch5627_probe(struct platform_device *pdev) ...@@ -746,6 +558,7 @@ static int __devinit sch5627_probe(struct platform_device *pdev)
if (err) if (err)
goto error; goto error;
pr_info("found %s chip at %#hx\n", DEVNAME, data->addr);
pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n", pr_info("firmware build: code 0x%02X, id 0x%04X, hwmon: rev 0x%02X\n",
build_code, build_id, hwmon_rev); build_code, build_id, hwmon_rev);
...@@ -768,85 +581,6 @@ static int __devinit sch5627_probe(struct platform_device *pdev) ...@@ -768,85 +581,6 @@ static int __devinit sch5627_probe(struct platform_device *pdev)
return err; return err;
} }
static int __init sch5627_find(int sioaddr, unsigned short *address)
{
u8 devid;
int err = superio_enter(sioaddr);
if (err)
return err;
devid = superio_inb(sioaddr, SIO_REG_DEVID);
if (devid != SIO_SCH5627_ID) {
pr_debug("Unsupported device id: 0x%02x\n",
(unsigned int)devid);
err = -ENODEV;
goto exit;
}
superio_select(sioaddr, SIO_SCH5627_EM_LD);
if (!(superio_inb(sioaddr, SIO_REG_ENABLE) & 0x01)) {
pr_warn("Device not activated\n");
err = -ENODEV;
goto exit;
}
/*
* Warning the order of the low / high byte is the other way around
* as on most other superio devices!!
*/
*address = superio_inb(sioaddr, SIO_REG_ADDR) |
superio_inb(sioaddr, SIO_REG_ADDR + 1) << 8;
if (*address == 0) {
pr_warn("Base address not set\n");
err = -ENODEV;
goto exit;
}
pr_info("Found %s chip at %#hx\n", DEVNAME, *address);
exit:
superio_exit(sioaddr);
return err;
}
static int __init sch5627_device_add(unsigned short address)
{
struct resource res = {
.start = address,
.end = address + REGION_LENGTH - 1,
.flags = IORESOURCE_IO,
};
int err;
sch5627_pdev = platform_device_alloc(DRVNAME, address);
if (!sch5627_pdev)
return -ENOMEM;
res.name = sch5627_pdev->name;
err = acpi_check_resource_conflict(&res);
if (err)
goto exit_device_put;
err = platform_device_add_resources(sch5627_pdev, &res, 1);
if (err) {
pr_err("Device resource addition failed\n");
goto exit_device_put;
}
err = platform_device_add(sch5627_pdev);
if (err) {
pr_err("Device addition failed\n");
goto exit_device_put;
}
return 0;
exit_device_put:
platform_device_put(sch5627_pdev);
return err;
}
static struct platform_driver sch5627_driver = { static struct platform_driver sch5627_driver = {
.driver = { .driver = {
.owner = THIS_MODULE, .owner = THIS_MODULE,
...@@ -858,31 +592,11 @@ static struct platform_driver sch5627_driver = { ...@@ -858,31 +592,11 @@ static struct platform_driver sch5627_driver = {
static int __init sch5627_init(void) static int __init sch5627_init(void)
{ {
int err = -ENODEV; return platform_driver_register(&sch5627_driver);
unsigned short address;
if (sch5627_find(0x4e, &address) && sch5627_find(0x2e, &address))
goto exit;
err = platform_driver_register(&sch5627_driver);
if (err)
goto exit;
err = sch5627_device_add(address);
if (err)
goto exit_driver;
return 0;
exit_driver:
platform_driver_unregister(&sch5627_driver);
exit:
return err;
} }
static void __exit sch5627_exit(void) static void __exit sch5627_exit(void)
{ {
platform_device_unregister(sch5627_pdev);
platform_driver_unregister(&sch5627_driver); platform_driver_unregister(&sch5627_driver);
} }
......
drivers/hwmon/sch56xx-common.c 0 → 100644
View file @ 28ff2f7a
/***************************************************************************
* Copyright (C) 2010-2011 Hans de Goede <hdegoede@redhat.com> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/acpi.h>
#include <linux/delay.h>
#include "sch56xx-common.h"
#define SIO_SCH56XX_LD_EM 0x0C /* Embedded uController Logical Dev */
#define SIO_UNLOCK_KEY 0x55 /* Key to enable Super-I/O */
#define SIO_LOCK_KEY 0xAA /* Key to disable Super-I/O */
#define SIO_REG_LDSEL 0x07 /* Logical device select */
#define SIO_REG_DEVID 0x20 /* Device ID */
#define SIO_REG_ENABLE 0x30 /* Logical device enable */
#define SIO_REG_ADDR 0x66 /* Logical device address (2 bytes) */
#define SIO_SCH5627_ID 0xC6 /* Chipset ID */
#define REGION_LENGTH 9
#define SCH56XX_CMD_READ 0x02
#define SCH56XX_CMD_WRITE 0x03
static struct platform_device *sch56xx_pdev;
/* Super I/O functions */
static inline int superio_inb(int base, int reg)
{
outb(reg, base);
return inb(base + 1);
}
static inline int superio_enter(int base)
{
/* Don't step on other drivers' I/O space by accident */
if (!request_muxed_region(base, 2, "sch56xx")) {
pr_err("I/O address 0x%04x already in use\n", base);
return -EBUSY;
}
outb(SIO_UNLOCK_KEY, base);
return 0;
}
static inline void superio_select(int base, int ld)
{
outb(SIO_REG_LDSEL, base);
outb(ld, base + 1);
}
static inline void superio_exit(int base)
{
outb(SIO_LOCK_KEY, base);
release_region(base, 2);
}
static int sch56xx_send_cmd(u16 addr, u8 cmd, u16 reg, u8 v)
{
u8 val;
int i;
/*
* According to SMSC for the commands we use the maximum time for
* the EM to respond is 15 ms, but testing shows in practice it
* responds within 15-32 reads, so we first busy poll, and if
* that fails sleep a bit and try again until we are way past
* the 15 ms maximum response time.
*/
const int max_busy_polls = 64;
const int max_lazy_polls = 32;
/* (Optional) Write-Clear the EC to Host Mailbox Register */
val = inb(addr + 1);
outb(val, addr + 1);
/* Set Mailbox Address Pointer to first location in Region 1 */
outb(0x00, addr + 2);
outb(0x80, addr + 3);
/* Write Request Packet Header */
outb(cmd, addr + 4); /* VREG Access Type read:0x02 write:0x03 */
outb(0x01, addr + 5); /* # of Entries: 1 Byte (8-bit) */
outb(0x04, addr + 2); /* Mailbox AP to first data entry loc. */
/* Write Value field */
if (cmd == SCH56XX_CMD_WRITE)
outb(v, addr + 4);
/* Write Address field */
outb(reg & 0xff, addr + 6);
outb(reg >> 8, addr + 7);
/* Execute the Random Access Command */
outb(0x01, addr); /* Write 01h to the Host-to-EC register */
/* EM Interface Polling "Algorithm" */
for (i = 0; i < max_busy_polls + max_lazy_polls; i++) {
if (i >= max_busy_polls)
msleep(1);
/* Read Interrupt source Register */
val = inb(addr + 8);
/* Write Clear the interrupt source bits */
if (val)
outb(val, addr + 8);
/* Command Completed ? */
if (val & 0x01)
break;
}
if (i == max_busy_polls + max_lazy_polls) {
pr_err("Max retries exceeded reading virtual "
"register 0x%04hx (%d)\n", reg, 1);
return -EIO;
}
/*
* According to SMSC we may need to retry this, but sofar I've always
* seen this succeed in 1 try.
*/
for (i = 0; i < max_busy_polls; i++) {
/* Read EC-to-Host Register */
val = inb(addr + 1);
/* Command Completed ? */
if (val == 0x01)
break;
if (i == 0)
pr_warn("EC reports: 0x%02x reading virtual register "
"0x%04hx\n", (unsigned int)val, reg);
}
if (i == max_busy_polls) {
pr_err("Max retries exceeded reading virtual "
"register 0x%04hx (%d)\n", reg, 2);
return -EIO;
}
/*
* According to the SMSC app note we should now do:
*
* Set Mailbox Address Pointer to first location in Region 1 *
* outb(0x00, addr + 2);
* outb(0x80, addr + 3);
*
* But if we do that things don't work, so let's not.
*/
/* Read Value field */
if (cmd == SCH56XX_CMD_READ)
return inb(addr + 4);
return 0;
}
int sch56xx_read_virtual_reg(u16 addr, u16 reg)
{
return sch56xx_send_cmd(addr, SCH56XX_CMD_READ, reg, 0);
}
EXPORT_SYMBOL(sch56xx_read_virtual_reg);
int sch56xx_write_virtual_reg(u16 addr, u16 reg, u8 val)
{
return sch56xx_send_cmd(addr, SCH56XX_CMD_WRITE, reg, val);
}
EXPORT_SYMBOL(sch56xx_write_virtual_reg);
int sch56xx_read_virtual_reg16(u16 addr, u16 reg)
{
int lsb, msb;
/* Read LSB first, this will cause the matching MSB to be latched */
lsb = sch56xx_read_virtual_reg(addr, reg);
if (lsb < 0)
return lsb;
msb = sch56xx_read_virtual_reg(addr, reg + 1);
if (msb < 0)
return msb;
return lsb | (msb << 8);
}
EXPORT_SYMBOL(sch56xx_read_virtual_reg16);
int sch56xx_read_virtual_reg12(u16 addr, u16 msb_reg, u16 lsn_reg,
int high_nibble)
{
int msb, lsn;
/* Read MSB first, this will cause the matching LSN to be latched */
msb = sch56xx_read_virtual_reg(addr, msb_reg);
if (msb < 0)
return msb;
lsn = sch56xx_read_virtual_reg(addr, lsn_reg);
if (lsn < 0)
return lsn;
if (high_nibble)
return (msb << 4) | (lsn >> 4);
else
return (msb << 4) | (lsn & 0x0f);
}
EXPORT_SYMBOL(sch56xx_read_virtual_reg12);
static int __init sch56xx_find(int sioaddr, unsigned short *address,
const char **name)
{
u8 devid;
int err;
err = superio_enter(sioaddr);
if (err)
return err;
devid = superio_inb(sioaddr, SIO_REG_DEVID);
switch (devid) {
case SIO_SCH5627_ID:
*name = "sch5627";
break;
default:
pr_debug("Unsupported device id: 0x%02x\n",
(unsigned int)devid);
err = -ENODEV;
goto exit;
}
superio_select(sioaddr, SIO_SCH56XX_LD_EM);
if (!(superio_inb(sioaddr, SIO_REG_ENABLE) & 0x01)) {
pr_warn("Device not activated\n");
err = -ENODEV;
goto exit;
}
/*
* Warning the order of the low / high byte is the other way around
* as on most other superio devices!!
*/
*address = superio_inb(sioaddr, SIO_REG_ADDR) |
superio_inb(sioaddr, SIO_REG_ADDR + 1) << 8;
if (*address == 0) {
pr_warn("Base address not set\n");
err = -ENODEV;
goto exit;
}
exit:
superio_exit(sioaddr);
return err;
}
static int __init sch56xx_device_add(unsigned short address, const char *name)
{
struct resource res = {
.start = address,
.end = address + REGION_LENGTH - 1,
.flags = IORESOURCE_IO,
};
int err;
sch56xx_pdev = platform_device_alloc(name, address);
if (!sch56xx_pdev)
return -ENOMEM;
res.name = sch56xx_pdev->name;
err = acpi_check_resource_conflict(&res);
if (err)
goto exit_device_put;
err = platform_device_add_resources(sch56xx_pdev, &res, 1);
if (err) {
pr_err("Device resource addition failed\n");
goto exit_device_put;
}
err = platform_device_add(sch56xx_pdev);
if (err) {
pr_err("Device addition failed\n");
goto exit_device_put;
}
return 0;
exit_device_put:
platform_device_put(sch56xx_pdev);
return err;
}
static int __init sch56xx_init(void)
{
int err;
unsigned short address;
const char *name;
err = sch56xx_find(0x4e, &address, &name);
if (err)
err = sch56xx_find(0x2e, &address, &name);
if (err)
return err;
return sch56xx_device_add(address, name);
}
static void __exit sch56xx_exit(void)
{
platform_device_unregister(sch56xx_pdev);
}
MODULE_DESCRIPTION("SMSC SCH56xx Hardware Monitoring Common Code");
MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
MODULE_LICENSE("GPL");
module_init(sch56xx_init);
module_exit(sch56xx_exit);
drivers/hwmon/sch56xx-common.h 0 → 100644
View file @ 28ff2f7a
/***************************************************************************
* Copyright (C) 2010-2011 Hans de Goede <hdegoede@redhat.com> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
int sch56xx_read_virtual_reg(u16 addr, u16 reg);
int sch56xx_write_virtual_reg(u16 addr, u16 reg, u8 val);
int sch56xx_read_virtual_reg16(u16 addr, u16 reg);
int sch56xx_read_virtual_reg12(u16 addr, u16 msb_reg, u16 lsn_reg,
int high_nibble);
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